What additional payment must a driver complete along with the original amount to regain a suspended license due to a bad check written to the RMV?

Answer: B — $15

To regain a suspended license due to a bad check written to the Registry of Motor Vehicles (RMV) in Massachusetts, the driver must pay not only the original fee for the license but also an additional fee as a penalty. This particular additional payment is set at $15. This requirement is in place because the RMV aims to ensure that all fees are settled properly, and writing a bad check represents a failure to provide payment as expected. Therefore, the correct choice reflects the necessary financial step a driver must complete to rectify the situation and have their licensing privileges restored.